Cut-off for cigarette making machines



CUT-OFF FOR CIGARETTE MAKING MACHINES Filed Aug. 29, 1936 4-Sheeis-Sheet 1 Aug. 15, 1939.

J. STEIN CUTOFF FOR CIGARETTE MAKING MACHINES Filed Aug. 29, 1936 4 Sheets-Sheet 2 Wm M NN 9m N KW NW 4 Y .%N NW @N W NN Q b A I x 1 N m I 4 U IIHI Aug. 15, 1939. J. A. STEIN 2,169,598

OUT-OFF FOR CIGARETTE MAKING MACHINES Filed Aug. 29, 1936 4 Sheets-Sheet 3 Z g 26 5:2 6 j (70%. AWSfa/w Arrow: *7

Aug. 15, 1939.

J. A. STEIN 2,169,598

CUTOFF FOR CIGARETTE MAKING MACHINES Filed Aug. 29, 1936 4 Sheets-Sheet 4 FIG. 5

l 29 I I E 1.5 T J7 INVENTOR JOHN A.STE|N ATI'ORN EY Patented Aug. 15, 1939 UNITED STATES PATENT FF1E CUT-OFF FOR CIGARETTE 'MAKING MACHINES Application August 29, 1936, Serial No. 98,529 In Great Britain September 27, 1935 Claims.

This invention relates to cut-offs for cigarette making machines of the continuous rod type, and has for its object to provide an improved and simplified construction of cut-off of the type in 5 which a rotary knife is provided to which an orbital movement is imparted whereby the knife has a movement during the cutting time in the direction of movement of the cigarette rod and which corresponds to or approximates the speed of travel of the cigarette rod.

The invention contemplates the use of a ledger plate of the closed type having a slot to accommodate the knife during the cutting operation which ledger plate also has a reciprocating movement along the axis of the cigarette rod.

The knife may comprise a disc cutter or a narrow blade having an eccentric cutting edge.

According to the invention the orbital movements of the knife are produced by a single crank device and telescopic coupling members are provided between the knife mounting and the ledger plate whereby the ledger plate is reciprocated and the axis horizontal of the knife is maintained parallel to the cigarette rod.

The invention consists in a cut-off for a cigarette making machine'of the continuous rod type, comprising a rotary knife having a mounting to which orbital movements are imparted by a single crank device, and a ledger plate adapted to reciprocate along the axis of the cigarette rod, and means coupling the knife mounting to the ledger plate whereby the reciprocations of the ledger plate are produced and the knife shaft is maintained parallel to the axis of the cigarette rod.

The coupling means may comprise a pair of rods connected to the knife mounting and engaging sockets on the ledger plate mounting.

In the accompanying drawings:

Figure l is a front elevation partly in section of a cigarette rod out 01f according to the invention.

Figure 2 is a cross sectional elevation through the axis of the crank shaft on line 22 of Figure 1.

Figure 3 is a sectional elevation through one of the telescopic coupling members.

Figure 4 is a sectional elevation through the axis of the knife shaft;

Figure 5 is a plan view taken on a horizontal plane, indicated in Figure 2 by the section line 55, through both of the shafts l0 and H, as seen in Figure 2.

In carrying the invention into effect according to one convenient mode, a crank shaft [0 is carried in a mounting ll fixed to the bed l2 of the machine, the shaft lying transversely of the bed having regard to the axis of the cigarette rod. Atthe rear end of the crank shaft a bevel gear drive i3 is provided from a vertical shaft I 4 ex- 5 tending below the bed of the machine.

At its forward end the crank shaft is provided with a crank pin l5 which carries a mounting It for the knife shaft ll through suitable antifriction bearings. The crank pin i5 is adjust- 1-0 able to the shaft iii by means of the screw l8 and has also fixed to it a bevel gear I9 which meshes with a bevel pinion 20 on the knife shaft and by which the knife 2! is rotated. The knife 25 is releasably mounted between clamping plates 15 22, 23 of which 22 is keyed to the shaft I! in known manner. The knife shaft I! extends at right angles to the crank shaft l0 and is thus parallel to the axis of the cigarette rod. Towards the rear of the knife mounting I6 and located on 20 either side of the axis of the crank pin a pair of sleeves 24 is provided which accommodate a pair of downwardly extending rods or posts 25, such posts being rigidly fixed in the sleeves 24.

The posts 25 slidingly engage within a pair of 5 socket members 26 carried by a ledger plate mounting 27 which is located below the knife mounting IS. The sockets 26 are inserted within sleeves 28 in the ledger plate mounting and are fixed thereto by the flanges 32 and nuts 29. 30 The posts 25 and sockets 26 form telescopic connections between the knife mounting l6 and the ledger plate mounting 21.

The ledger plate mounting 21 is provided with a pair of guide tubes 3!] which slideupon rods 35 3| fixed in the mounting H and lying parallel with the axis of the cigarette rod and in a horizontal plane.

The ledger plate 32 is located at one end of its mounting 21 and is provided with a slot 33 to 40 accommodate the knife 2} during cutting.

By the above arrangement it will be appreciated that as the crank shaft it rotates an orbital movement will be imparted to the knife mounting i6 and by reason of the telescopic cou- 45 plings 25, 26 between the knife mounting l5 and the ledger plate mounting 21, the latter will be reciprocated along the rods 3i in accordance with the lateral components of the movement of the knife mounting. 50

At the same time the telescopic couplings 25,

26 maintain the axis of the knife shaft il parallel to the axis of the ledger plate and cigarette rod whereby a knife mounting having only a single point of suspension is provided, thus sim- 55 for engagement of the shaft [9 with the gears the continuous rodtype comprising a rotary knife I3, and means, comprising a screw l8, for mounting the pin l5 upon the shaft I0.

I claim: V 1. A cut-off for cigarette making machines of rotatable on an axis parallel tothe cigarette-rod, a mounting for the knife, asingle crank carrying the knife mounting, a ledger plate reciprocable along the axis of the cigarette rod, a mounting for the ledger plate, and vertical telescopic means coupling the mountings together and permitting the knife mounting to approach and recede vertically from the ledger plate mounting, and acting as connections whereby said ledger plate derives a reciprocatory movement exclusively from said single crank. 7

2. A cut-off for cigarette making machines of the continuous rod type as claimed in claim 1 wherein the ledger plate mounting is supported by, and reciprocates upon, a pair of spaced horiz ontal rods arranged parallel to the axis of the cigarette rod.

3. A cut-off for cigarette making machines of the continuous rod type having means to advance a rod horizontally, comp-rising a single crank shaft having a crank pin, a mounting for a knife carried upon said crank pin, said knife being rotatable on an axis parallel to the cigarette rod, a ledger plate, a mounting for the ledger plate reciprocable in a direction parallel to the axis of the cigarette rod, telescopic means disposed vercigarette rod, and engaging sockets carried by the other mounting, said telescopic means acting as connections whereby said ledger plate derives a reciprocato-ry movement exclusively from said single crank shaft. v V 4. A cut-off for cigarette making machines of the continuous rod type having means to advance a rod in a' horizontal plane, comprising a single crank shaft having a crank pin, a mounting for a knife carried upon said crank pin, said knife being rota-table on an axis lying in a plane parallelto the plane of the cigarette rod, and spaced above the same, a ledger plate, a mounting for the ledger plate reciprocable in a horizontal plane parallel to the axis of the cigarette rod, vertically located sleeves fixed to the knife mounting on either side of the crank shaft, corresponding vertically arranged sleeves on the mounting, and interengaging means carried in said sleeves and forming telescopic couplings between the mountings, acting as connections whereby said ledger plate derives a reciprocatoz'y movement exclusively from said single crank shaft. I

5. A cut-off for cigarette making machines of the continuous rod type as claimed in claim 1, wherein the ledger plate has mounting sleeves,and said rotary knife has mounting sleeves, said telescopic means comprising a pair of spaced vertical rods disposed in said last-named sleeves and depending therefrom, and vertical sockets disposed on said ledger plate mounting sleeves, said rods engaging and sliding in said vertical sockets.

JOHN ALFRED STEIN.

ledger plate 

